Ejector for slot-cutting dies



' A118. 4 J. D.'KLOPFENSTEIN EJECTOR FOR SLOT-CUTTING-DIES Fi1ed Nov. 18, 1942 {CF71 I Patented Aug. 24, 1943 $27,535; EJECTOR roa @LOT-CUTTING mes eet sfihati aii Jesse 1,); K10 fiepstein,

a r 514-, assi r t mil-Lemmas 18, 1942, Serial No. 466,005

-=.In luv-prior application, Serial.Number 458,046, Izhave disclosed a novel-means'f 'or eje'cting-ffrom the cutting dies the strips severed froina piece cardboard in the operation of forming narrow. slats therein. .While such: mea'ns are applicable toslots opening out through the edge" o'the piece .of. cardboard as well as to slots "completely surmunded'by cardboard material; the present inventionhaszfor its object simpler'meansior ejecting the'strip from 'a"slot' mans the na ture of a deep, narrow notchinaniargin'al p'ortionoflthe cardboard.

In carrying out 'my invention, I employ a sturdy spring-as in the other form,'but'a;ii1 able to .dispense with a separate ejector bar by align ingjhe spring with the'spac'ebetween the'frutes forcuttingthe sides of 'the'slot, and extending the spring into said space through the 'opeii'en'd ofitheiatter. .It is immaterial how narrow the: slot is, because the fre'e'ndof'the spring may be iiattened' without weakeningthe 'rernainder tn permit.it,to.lie between'rules'spaced onljie short distance apart. In this'con's'tructic'in the parts .are 'so proportioned that the" end 'of hit; spring, while parallel to the upper edge 'of'the ruls'ihtweerfwhich it .li'esf normally projects somewhat above the same. Therefore, when a piece of cardboard is forced down to cut it, the free end of the wire also moves down and, as soon as the pressure is released, the wire again moves up and raises the little strip of cardboard out of the dies.

The various features of novelty whereby my invention is characterized will hereinafter be pointed out with particularity in the claims; but, for a full understanding of my invention and of its objects and advantages, reference may be had to the following detailed description taken in connection with the accompanying drawing, wherein:

Figure 1 is a plan view of a cardboard square from which has been cut a disk containing two long, narrow edge slots or notches; Fig. 2 is a plan view, on a larger scale, showing the die by means of which the disk was cut, the cardboard being shown in broken lines; Fig. 3 is a section on an enlarged scale on line 3-3 of Fig. 2; Fig. 4 is a section on line 4-4 of Fig. 2 and Fig. 5 is a section on line 5-5 of Fig. 2.

Referring to Fig. 1 of the drawing, A represents a piece of cardboard or the like from which a disk B has been severed, although it remains in the plane of the original sheet. Two deep notches or slots C and D extend into the disk from the periphery, the notch or open slot D being curved, The little tonguesE, and 1?,

partially severed from "the" main sheet dn tiie cutting of"the"slots" or--'n tcises, -still' remain t I !'.IH',.

Thedie for cutting out the disk shown in Fig. 1, consists of a ba'set, conveniently.of-=wodd;'2ha\ting'set therein rules Z-ihatiomi a-cirble' or: ring divided "at the piacewWhe're-the. stats are to occurf At the pomt'wherthe-slot-E is to be cut-there is a little gap-in the ringland awe of parallel rules 3, placedaashdrt distanbe apart, extendinwardiy' throng-h a distairrcw equal to th' lengtlrcfthe slottoibe prcfducefi? Arranged across'the inner aidstif the anew-is anarrow ruIe"4. it"wiil be seen that the rides" 3* and 4 serv'to cut'but'thetongue'Evet Rig. 1." A t=the poi'nt where-thesiot -33! is"tc'occurthere'it an otherv 'ga'p-in the ring and hraare located a Pair oi"paralle1"-curvedmiles '5that meet cross rule 4; this'-"g'roup. ot-thr-eefiides tutti "out the ng I. J" 'c.- 2'- no The ejector; in the arrangements shown, comprises a spring :wir'e Eef spri'ngmietal wincmaay belarger' 'in' diameterthan"-the tlistan betwh the "rules 3; '3 or 5; 5 one'en@being to have 'fiatsides'an'd a fiattop ahd being -"tlir'n enough to extend freely into the space between the corresponding rules. The other end of each of the spring wires is fashioned into an eye 8.

The parts are so proportioned that when the eye of one of the springs is placed on top of the base while the free flattened end extends between the cooperating slot-cutting rules, such free end projects somewhat upon the upper edge of the rules as shown in Figs, 4 and 5; this being accomplished by properly curving the wire from a point adjacent to the eye to a point near the flattened free end. Each ejector is fastened to the base by a screw 9 extending down through the eye and into the base.

I have not described in detail the process of die cutting or the actual construction of dies, since these things are old and well known; the only novel feature being the strong, simple ejectors that prevent the clogging of the slot-cutting die portions by the cardboard material when pieces containing edge slots are cut from cardboard or the like in the usual way.

As heretofore pointed out, the spring wire may be made as heavy as desired, so as to be certain to eject the little tongues from the dies, no matter how narrow the dies; due to the fact that only a short section at the free end of the spring enters the space between the slot-cutting rules. Consequently, although this free end section of the wire may have to be quite thin, it may be deep enough in the vertical direction to enable it to withstand a sufficient downward pressure to bend a fairly heavy spring during a cutting operation. Also, the flattened end of the spring may be regarded as being a bar-like ejector element and the remainder of the spring as comprising a continuation of such element together with suitable spring means yieldingly to support the said element.

While I have illustrated and described with particularity only a single preferred form of my invention, I do not desire to be limited to the exact structural details thus illustrated and described; but intend to cover all forms and arrangements which come within the definitions of my invention constituting the appended claims.

I claim:

1. The combination with a die for cutting a piece of cardboard or the like and forming a slot extending inwardly through one of the several edges, which comprises a base and rules rising therefrom and sharpened at their upper edges, including rules to make the cuts along the sides and the inner end of the slot: of a sturdy spring wire fastened at one end to the base at a point outwardly from the space between the slot-forming rules and so located that the free end of the wire extends into said space, and the wire being curved upwardly to cause its free end normally to project above the rules.

2..The combination with a die for cutting a piece of cardboard or the like and forming a slot extending inwardly through one of the severed edges, which comprises a base and rules rising therefrom and sharpened at their upper edges,

including rules to make the cuts along the sides and the inner end of the slot: of a thick spring wire having one end flattened for entry into the space between the slot-forming rules, said wire being fastened at its other end to the base at a point remote from the slot forming rules and so located that the free flattened end lies between and parallel to the cutting edges of the rules that make the cuts to produce the side edges of the slot, and the spring curving upwardly from i springinormally' projecting above the rules, and

the spring curving downwardly from said end to the base at a point remote from the slot-forming the spring curving downwardly from said end tothe base at a point-remote from the slot-forming rules and having there an eye lying fiat on the base, and a fastening device extending through said eye and into the base,

5. The combination with a die for cutting a piece of cardboard or the like and forming a slot extending inwardly-through one of the severed edges, which comprises a base and rules rising therefrom and sharpened at their upper edges, including rules to make the cuts along the sides and the inner end of the slot: of an ejector including a resilient means positioned outwardly from the outer ends of the rules adapted to cut the sides of a slot and a bar-like element projecting from said means into the upper part of the space between the slot-forming rules, parallel with the upper edges of the rules, for cutting the sides of the slot.

JESSE D. KLOPFENSTEIN. 

